Class V

A tank is 25 m long, 12 m wide and 6 m deep. The cost of plastering its walls and bottom at 75 paise per sq. m, is:
  1. Rs. 456
  2. Rs. 458
  3. Rs. 558
  4. Rs. 568
The ratio between the length and the breadth of a rectangular park is 3 : 2. If a man cycling along the boundary of the park at the speed of 12 km/hr completes one round in 8 minutes, then the area of the park (in sq. m) is
  1. 15360
  2. 153600
  3. 30720
  4. 307200
The difference between the length and breadth of a rectangle is 23 m. If its perimeter is 206 m, then its area is:
  1. 1520 m2
  2. 2420 m2
  3. 2480 m2
  4. 2520 m2
The percentage increase in the area of a rectangle, if each of its sides is increased by 20% is:
  1. 40%
  2. 42%
  3. 44%
  4. 46%
The ratio between the perimeter and the breadth of a rectangle is 5 : 1. If the area of the rectangle is 216 sq. cm, what is the length of the rectangle?
  1. 16 cm
  2. 24 cm
  3. Data inadequate
  4. 18
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